Diagnostic performance of 1.5T and 3T 3D-TOF-MRA in primary central nervous system vasculitis compared with DSA
| Sensitivity (%) | Specificity (%) | Accuracy (%) | PPV | NPV | |
|---|---|---|---|---|---|
| Diagnosis per patient | 96 (24/25) | 100 (6/6) | 96.77 (30/31) | 100 | 85.7 |
| Diagnosis per segment on all MR units (n = 31) | 83.3 (116/141) | 98.9 (627/634) | 95.9 (743/775) | 94.3 | 96.2 |
| 1.5 MR units (n = 20) | 81.5 (75/92) | 98.5 (402/408) | 95.4 (477/500) | 92.6 | 95.9 |
| 3T MR units (n = 11) | 83.7 (41/49) | 99.6 (225/226) | 96.7 (266/275) | 97.6 | 96.6 |
Note:—PPV indicates positive predictive value; NPV, negative predictive value.